- Alzheimer’s disease is a severe form of cognitive decline, affecting around 47 million people globally with projections to reach over 131 million by 2050; it disrupts neuronal communication and causes progressive brain cell deterioration
- A Penn State College of Medicine study demonstrated that daily physical activity, regardless of intensity, improves cognitive processing speed by approximately 60 milliseconds, effectively reducing cognitive age by about four years
- Aerobic exercises boost brain health by increasing brain-derived neurotrophic factor, enhancing spatial learning, memory, and visual pattern separation, stimulating neurogenesis in the hippocampus and improving synaptic plasticity
- Resistance training provides superior cognitive benefits for older adults, requiring lower exercise intensities to achieve significant improvements in cognitive performance
- Incorporating consistent physical activity into your daily routine while supporting mitochondrial health by minimizing your exposure to toxins will help reduce your risk of cognitive decline and promote long-term brain health
(Mercola)—A healthy cognitive function is vital for navigating daily life, but it’s something many take for granted until it starts to slip. Alzheimer’s disease is a striking example of what happens when cognitive decline worsens. Characterized by the accumulation of amyloid plaques and tau tangles in the brain, Alzheimer’s disease disrupts neuronal communication and causes brain cell death, leading to impaired memory, language and daily functioning.
Globally, an estimated 47 million people worldwide are living with dementia, with Alzheimer’s disease accounting for 60% to 80% of these cases. This number is expected to surge to over 131 million by 2050 as the global population ages. In the United States alone, the prevalence of Alzheimer’s among those aged 65 and older is projected to rise significantly, with life expectancy after diagnosis typically ranging from three to nine years.1
Alzheimer’s disease (AD) presents significant challenges due to its progressive nature and lack of a cure. Conventional treatments, which include medications, often focus on managing symptoms rather than stopping its progression, but they often come with side effects and have limited efficacy. As a result, there is a growing interest in alternative approaches, such as physical activity, which offers a low-cost and accessible means to combat cognitive decline.
Daily Activity, No Matter How Small, Boosts Brain Speed
A recent study2 from Penn State College of Medicine explored how different types of physical activity affect cognitive processing speed. To conduct this study, the participants were asked to log their physical activities and complete cognitive tests five times a day for a week using a mobile app. This approach allowed researchers to gather dynamic, real-time data, providing a more comprehensive understanding of how daily movements influence cognitive processes.
The results showed that participants experienced improved cognitive processing speed by approximately 60 milliseconds immediately after physical activity. This is equivalent to a reduction in cognitive age by about four years. The improvement was evident in tasks like symbol-matching, which assesses how quickly the brain processes and responds to visual information.3
One of the key mechanisms behind these cognitive benefits is the heightened sense of alertness that accompanies physical activity. Movement increases physiological arousal in the brain, which in turn boosts alertness and cognitive readiness. As a result, you’re better prepared to focus your attention and perform tasks with greater efficiency.
Interestingly, while higher-intensity exercises benefit cognitive health by releasing beneficial chemicals and neurotransmitters that support neuronal function and enhance communication between brain cells, the research confirms that even everyday activities deliver meaningful cognitive advantages.
Physical activity, regardless of intensity, is also linked to improved cardiovascular function, which enhances blood flow to the brain, creating an environment that supports optimal brain performance.
These findings highlight the profound impact that everyday physical activities have on cognitive processing speed. Whether it’s a brisk walk, a household chore or light stretching, engaging in any form of movement leads to significant short-term improvements in brain function. Hence, incorporating regular physical activity into your daily life is a simple yet effective strategy for enhancing your mental performance and maintaining cognitive health.4
Exercise Fuels Your Brain Flexibility and Sharpens Your Memory
The Penn State College of Medicine study aligns with earlier research from 2015, published in Cellular and Molecular Life Sciences,5 which demonstrated how aerobic and resistance exercises enhance cognitive functions and maintain brain health without the use of medications. By examining adult and elderly populations, the study provided comprehensive insights into how different types of physical activity influence the brain.
Participants engaged in aerobic activities, such as running or cycling, and resistance training, like weightlifting. Both types of exercise significantly improved spatial learning and memory, skills essential for navigating environments and recalling locations. Regular physical activity was found to induce structural changes in the hippocampus, a region responsible for memory and navigation.
In both human and animal models, exercise increases the size of the dentate gyrus, where new neurons are generated. Remarkably, in rodents, this area could double or triple in size with consistent activity, directly enhancing memory and learning outcomes.
Another striking finding was the impact of aerobic exercise on visual pattern separation, which helps you distinguish between similar images — a key component of memory retention. Young adults who maintained a routine of aerobic exercise showed superior memory performance compared to less active individuals.
Resistance training provided unique benefits for elderly participants, leading to sustained improvements in spatial memory and other cognitive functions over six months.6
The study also explored biological mechanisms underlying these improvements. One major factor identified was the increase in brain-derived neurotrophic factor (BDNF), a protein that plays an essential role in brain plasticity, enabling the brain to adapt, reorganize and form new connections. Higher BDNF levels were consistently linked to improved memory and cognitive flexibility.
Exercise also boosts insulin-like growth factor 1 (IGF-1), which supports neuron growth and survival, further enhancing learning and memory.7
Synaptic plasticity (how efficiently neurons communicate) was another area of focus. Exercise-induced increases in BDNF and IGF-1 improved synaptic plasticity, creating an environment conducive to efficient information processing and retrieval. Long-term potentiation (LTP), a mechanism essential for memory formation, was also enhanced. In rodent models, running significantly strengthened LTP, highlighting exercise’s role in memory storage and recall.
Moreover, the study emphasized that regular physical activity supports neurogenesis, particularly in the hippocampus. The ongoing generation of new neurons fosters cognitive resilience, helping the brain adapt to age-related decline or neurodegenerative conditions. This continuous renewal process ensures the brain forms new memories and responds effectively to new challenges.8
Daily Activity, No Matter How Small, Boosts Brain Speed
A recent study2 from Penn State College of Medicine explored how different types of physical activity affect cognitive processing speed. To conduct this study, the participants were asked to log their physical activities and complete cognitive tests five times a day for a week using a mobile app. This approach allowed researchers to gather dynamic, real-time data, providing a more comprehensive understanding of how daily movements influence cognitive processes.
The results showed that participants experienced improved cognitive processing speed by approximately 60 milliseconds immediately after physical activity. This is equivalent to a reduction in cognitive age by about four years. The improvement was evident in tasks like symbol-matching, which assesses how quickly the brain processes and responds to visual information.3
One of the key mechanisms behind these cognitive benefits is the heightened sense of alertness that accompanies physical activity. Movement increases physiological arousal in the brain, which in turn boosts alertness and cognitive readiness. As a result, you’re better prepared to focus your attention and perform tasks with greater efficiency.
Interestingly, while higher-intensity exercises benefit cognitive health by releasing beneficial chemicals and neurotransmitters that support neuronal function and enhance communication between brain cells, the research confirms that even everyday activities deliver meaningful cognitive advantages.
Physical activity, regardless of intensity, is also linked to improved cardiovascular function, which enhances blood flow to the brain, creating an environment that supports optimal brain performance.
These findings highlight the profound impact that everyday physical activities have on cognitive processing speed. Whether it’s a brisk walk, a household chore or light stretching, engaging in any form of movement leads to significant short-term improvements in brain function. Hence, incorporating regular physical activity into your daily life is a simple yet effective strategy for enhancing your mental performance and maintaining cognitive health.4
Exercise Fuels Your Brain Flexibility and Sharpens Your Memory
The Penn State College of Medicine study aligns with earlier research from 2015, published in Cellular and Molecular Life Sciences,5 which demonstrated how aerobic and resistance exercises enhance cognitive functions and maintain brain health without the use of medications. By examining adult and elderly populations, the study provided comprehensive insights into how different types of physical activity influence the brain.
Participants engaged in aerobic activities, such as running or cycling, and resistance training, like weightlifting. Both types of exercise significantly improved spatial learning and memory, skills essential for navigating environments and recalling locations. Regular physical activity was found to induce structural changes in the hippocampus, a region responsible for memory and navigation.
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In both human and animal models, exercise increases the size of the dentate gyrus, where new neurons are generated. Remarkably, in rodents, this area could double or triple in size with consistent activity, directly enhancing memory and learning outcomes.
Another striking finding was the impact of aerobic exercise on visual pattern separation, which helps you distinguish between similar images — a key component of memory retention. Young adults who maintained a routine of aerobic exercise showed superior memory performance compared to less active individuals.
Resistance training provided unique benefits for elderly participants, leading to sustained improvements in spatial memory and other cognitive functions over six months.6
The study also explored biological mechanisms underlying these improvements. One major factor identified was the increase in brain-derived neurotrophic factor (BDNF), a protein that plays an essential role in brain plasticity, enabling the brain to adapt, reorganize and form new connections. Higher BDNF levels were consistently linked to improved memory and cognitive flexibility.
Exercise also boosts insulin-like growth factor 1 (IGF-1), which supports neuron growth and survival, further enhancing learning and memory.7
Synaptic plasticity (how efficiently neurons communicate) was another area of focus. Exercise-induced increases in BDNF and IGF-1 improved synaptic plasticity, creating an environment conducive to efficient information processing and retrieval. Long-term potentiation (LTP), a mechanism essential for memory formation, was also enhanced. In rodent models, running significantly strengthened LTP, highlighting exercise’s role in memory storage and recall.
Moreover, the study emphasized that regular physical activity supports neurogenesis, particularly in the hippocampus. The ongoing generation of new neurons fosters cognitive resilience, helping the brain adapt to age-related decline or neurodegenerative conditions. This continuous renewal process ensures the brain forms new memories and responds effectively to new challenges.8
- 1 BMC Geriatr 19, 181 (2019)
- 2, 3, 4 Ann Behav Med. 2024 Oct 19:kaae059
- 5, 6, 7, 8 Cell Mol Life Sci. 2015 Dec 8;73(5):975–983
- 9, 10, 11, 12, 14 Ageing Research Reviews, Volume 76, April 2022, 101591
- 13 J Alzheimers Dis. 2021 Mar 9;80(1):233–244
- 15 Neurology. 2021 Dec 14; 97(24): e2381–e2391, Abstract
- 16 World Wildlife Fund, Assessing Plastic Ingestion from Nature to People, 2019
- 17 Open Journal of Veterinary Medicine, 2021, 11, 57-86
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